getRequestDispatcher method

Hi I wanted to use this getRequestDispatcher method in the form getServletContext.getRequestDispatcher("some jsp file") to transfer control to a jsp from a servlet. But this is available only in version 2.1 I am using SDK 2.0, and JavaWebServer. Any idea about how to do it in this environment? and also I could not find where to download SDK2.1 Can anyone help please? Regards Debanjana